"Organometallic compounds contain per definition a metal-carbon bond. Therefore, the present Volume 7 is related to the preceding Volume 6, Metal-Carbon Bonds in Enzymes and Cofactors, which, as follows from its title, focused on living organisms. Now the focus is on the role that organometal(loid)s play in the environment and in toxicology; naturally, here again living systems are involved in the synthesis, transformation, remediation, detoxification, etc."--Preface